// Copyright (c) 2016 Readium Foundation
//
// Redistribution and use in source and binary forms, with or without modification,
// are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this
//    list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright notice,
//    this list of conditions and the following disclaimer in the documentation and/or
//    other materials provided with the distribution.
// 3. Neither the name of the organization nor the names of its contributors may be
//    used to endorse or promote products derived from this software without specific
//    prior written permission
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
// ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 

package main

import (
	"log"
	"math/rand"
	"os"
	"strconv"
	"time"

	"github.com/abbot/go-http-auth"
)

func main() {

	var salt []byte
	var magic []byte
	if len(os.Args) < 2 {
		panic("need a password")
	}
	if len(os.Args) > 2 {
		salt = []byte(os.Args[2])
	} else {
		r := rand.New(rand.NewSource(int64(time.Now().Unix())))
		salt = []byte(strconv.Itoa(r.Int()))
	}
	if len(os.Args) > 3 {
		magic = []byte("$" + string(os.Args[3]) + "$")
	} else {
		magic = []byte("$" + "$")
	}

	log.Println(string(auth.MD5Crypt([]byte(os.Args[1]), salt, magic)))

}
